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arXiv physics/0505187physics.opticsnlin.PS
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长optical fibers中短脉冲的统计描述:非定域性效应

Statistical description of short pulses in long optical fibers: Effects of nonlocality

P. K. Shukla, M. Marklund

摘要:

我们提出了一个统计描述的短脉冲在长光纤中的传播,考虑到克尔和非局域非线性在平等的基础上。我们利用Wigner方法对修正的非线性Schroedinger方程进行近似,得到了一个波动方程和一个非线性色散关系。后者表明,光脉冲的退相干降低了调制不稳定性的增长率,从而有助于长光纤中脉冲的非线性稳定性。研究还发现,谱展宽和非定域性的相互作用使不稳定区域扩大。

英文摘要:

We present a statistical description of the propagation of short pulses in long optical fibers, taking into account the Kerr and nonlocal nonlinearities on an equal footing. We use the Wigner approach on the modified nonlinear Schroedinger equation to obtain a wave kinetic equation and a nonlinear dispersion relation. The latter exhibit that the optical pulse decoherence reduces the growth rate of the modulational instability, and thereby contribute to the nonlinear stability of the pulses in long optical fibers. It is also found that the interaction between spectral broadening and nonlocality tends to extend the instability region.

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